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Oil free screw blower

Supply capacity100 sets per month
Delivery time15-30 days depending on quantity and specifications
Packingexport wood packing
CertificateISO9001/ISO14001
Capacity2-150m3/min
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Product Details

Product Overview

The oil-free screw blower is an advanced positive displacement blower featuring a pair of high-speed, counter-rotating, precisely matched helical rotors (male and female). During operation, extremely small gaps are maintained between the rotors and between the rotors and the housing, achieving continuous, stable gas delivery through non-contact synchronous gear transmission. Compared to traditional Roots blowers, it offers significantly higher energy efficiency, lower noise, and 100% oil-free air output.

Core Technological Advantages

1. Exceptional Energy Efficiency

  • Internal Compression: Gas compression is completed within the cavity, unlike the external compression of Roots blowers. This results in higher work efficiency and eliminates energy losses from over-compression and under-compression.
  • Low Internal Leakage: Precision rotor profiles and minimal operating clearances greatly reduce high-pressure gas leakage into low-pressure areas, improving volumetric efficiency.
  • 20–35% Energy Savings: Under equivalent operating conditions, oil-free screw blowers typically save 20–35% more energy than traditional Roots blowers, delivering significant long-term electricity cost reductions.

2. 100% Oil-Free Air Delivery

  • Delivered air is absolutely pure with zero oil content
  • Ensures process safety and product quality in contamination-sensitive industries
  • Ideal for food & beverage, pharmaceutical, semiconductor, and chemical synthesis applications

3. Low Noise & Low Vibration

  • Smooth helical rotor rotation replaces the periodic impact meshing of Roots blower rotors
  • Noise and vibration reduced at the source
  • Operating noise typically controlled to approximately 85 dB

4. Excellent Reliability & Low Maintenance

  • Non-Contact Operation: No wear between rotors — core unit designed for decades of service life
  • Intelligent Control: Advanced VFD control with soft start/stop, constant pressure control, automatic load adjustment, and fault early warning
  • Easy Maintenance: Limited to periodic replacement of air filters, oil filters (gearbox), and lubricating oil. Long maintenance cycles with overall costs far lower than Roots blowers.

5. Wide Operating Range

  • Variable frequency drive enables efficient operation across a broad range of flow and pressure
  • Strong adaptability to fluctuating operating conditions

Applications

  • Wastewater treatment aeration
  • Food and beverage processing
  • Pharmaceutical production
  • Semiconductor manufacturing
  • Chemical gas synthesis and transfer
  • Pneumatic conveying systems
  • Cement and building material production
  • Flue gas desulfurization

Packing & Shipping

  • Export-grade wooden crate packaging
  • Supply capacity: 100 sets per month
  • Delivery time: 15–30 days depending on quantity and specifications

Specifications

Supply capacity100 sets per month
Delivery time15-30 days depending on quantity and specifications
Packingexport wood packing
CertificateISO9001/ISO14001
Capacity2-150m3/min
Pressure40-200kpa
Power3KW-315KW
Rotary speed1100-2300rpm
Motor Power supply380/400/415/440V, three phase, 50/60HZ
Motoroptional

Frequently Asked Questions

What is an oil-free screw blower and why is it important for my industrial process?

An oil-free screw blower is a type of positive displacement blower that performs its operation without the use of oil in the compression chamber, ensuring that the air delivered is 100% clean and free from oil contamination. This is particularly important for applications in industries such as food and beverage, pharmaceuticals, and electronics, where oil contamination can compromise product quality, safety, and performance. By using an oil-free screw blower, you can maintain high standards of hygiene and purity, avoiding the need for expensive and cumbersome air filtration systems.

How does an oil-free screw blower work compared to an oil-lubricated blower?

An oil-free screw blower operates on a similar principle to an oil-lubricated blower, where two screws rotate to compress air. However, the key difference lies in the lubrication method. In an oil-free screw blower, the screws are typically made of high-quality materials and tolerances that allow them to operate without the need for oil in the air path. Instead, they are often lubricated using dry screw technology or other non-contact seals, ensuring that the air passing through the system remains completely oil-free. Unlike oil-lubricated blowers, oil-free models do not require regular oil changes or the risk management associated with oil carryover, making them a more efficient and cleaner option for air-intensive processes.

What are the advantages of using an oil-free screw blower over traditional oil-lubricated screw blowers?

The advantages of using an oil-free screw blower include delivering 100% clean air, which is essential for industries that require high levels of hygiene and product purity. They also offer lower maintenance costs as there is no need for oil changes or oil filters, and they reduce the risk of operational downtime due to oil contamination. Furthermore, oil-free screw blowers are environmentally friendly, as they do not release oil into the environment. They are also more reliable in the long term and can improve the efficiency of your processes by eliminating the need for additional air filtration systems, which can be costly and reduce air flow.

Are oil-free screw blowers suitable for high-temperature operations?

Yes, oil-free screw blowers are designed to handle a wide range of operating temperatures, making them suitable for high-temperature applications. They are engineered with materials and cooling systems that can maintain performance and durability even under demanding conditions. For instance, the use of high-grade coatings and manufacturing processes ensures that the internal components can withstand high temperatures without compromising the oil-free air delivery. However, it's important to consult the specific model's specifications and manufacturer recommendations to ensure it meets the requirements of your particular high-temperature process.

What maintenance is required for an oil-free screw blower to keep it running efficiently?

To maintain the efficiency and longevity of an oil-free screw blower, regular maintenance is necessary but generally less intensive than for oil-lubricated models. Key maintenance tasks include checking and cleaning the air intake filters, monitoring the cooling system for proper operation, and inspecting the screws and seals for wear. It's also important to keep the blower clean and free from debris, and to periodically check the electrical connections and control systems. Following the manufacturer’s maintenance schedule and guidelines will help ensure optimal performance and minimize the risk of unexpected breakdowns.

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